;(function(window, document, $) {
 
     // Opera Mini v7 doesn’t support placeholder although its DOM seems to indicate so
     var isOperaMini = Object.prototype.toString.call(window.operamini) == '[object OperaMini]';
     var isInputSupported = 'placeholder' in document.createElement('input') && !isOperaMini;
     var isTextareaSupported = 'placeholder' in document.createElement('textarea') && !isOperaMini;
     var prototype = $.fn;
     var valHooks = $.valHooks;
    var propHooks = $.propHooks;
     var hooks;
    var placeholder;
 
    if (isInputSupported && isTextareaSupported) {
  
        placeholder = prototype.placeholder = function() {
             return this;
         };
 
        placeholder.input = placeholder.textarea = true;
 
     } else {
 
         placeholder = prototype.placeholder = function() {
             var $this = this;
             $this
                 .filter((isInputSupported ? 'textarea' : ':input') + '[placeholder]')
                 .not('.placeholder')
                 .bind({
                     'focus.placeholder': clearPlaceholder,
                     'blur.placeholder': setPlaceholder
                 })
                .data('placeholder-enabled', true)
                 .trigger('blur.placeholder');
            return $this;
         };
 
         placeholder.input = isInputSupported;
         placeholder.textarea = isTextareaSupported;

        hooks = {
             'get': function(element) {
                 var $element = $(element);
 
                 var $passwordInput = $element.data('placeholder-password');
                if ($passwordInput) {
                     return $passwordInput[0].value;
                }
  
                 return $element.data('placeholder-enabled') && $element.hasClass('placeholder') ? '' : element.value;
            },
             'set': function(element, value) {
               var $element = $(element);
 
                  var $passwordInput = $element.data('placeholder-password');
                 if ($passwordInput) {
                     return $passwordInput[0].value = value;
                }

               if (!$element.data('placeholder-enabled')) {
                    return element.value = value;
                }
                 if (value == '') {
                    element.value = value;
                     // Issue #56: Setting the placeholder causes problems if the element continues to have focus.
                    if (element != safeActiveElement()) {
                        // We can't use `triggerHandler` here because of dummy text/password inputs :(
                         setPlaceholder.call(element);
                     }
                 } else if ($element.hasClass('placeholder')) {
                     clearPlaceholder.call(element, true, value) || (element.value = value);
                  } else {
                     element.value = value;
                 }
                 // `set` can not return `undefined`; see http://jsapi.info/jquery/1.7.1/val#L2363
                 return $element;
             }
         };
  
         if (!isInputSupported) {
             valHooks.input = hooks;
             propHooks.value = hooks;
         }
        if (!isTextareaSupported) {
              valHooks.textarea = hooks;
            propHooks.value = hooks;
          }
 
         $(function() {
             // Look for forms
             $(document).delegate('form', 'submit.placeholder', function() {
                 // Clear the placeholder values so they don't get submitted
                 var $inputs = $('.placeholder', this).each(clearPlaceholder);
                  setTimeout(function() {
                    $inputs.each(setPlaceholder);
                }, 10);
             });
          });
 
         // Clear placeholder values upon page reload
         $(window).bind('beforeunload.placeholder', function() {
             $('.placeholder').each(function() {
                 this.value = '';
             });
         });

     }

     function args(elem) {
         // Return an object of element attributes
        var newAttrs = {};
         var rinlinejQuery = /^jQuery\d+$/;
         $.each(elem.attributes, function(i, attr) {
             if (attr.specified && !rinlinejQuery.test(attr.name)) {
                 newAttrs[attr.name] = attr.value;
             }
         });
         return newAttrs;
     }
 
    function clearPlaceholder(event, value) {
        var input = this;
        var $input = $(input);
        if (input.value == $input.attr('placeholder') && $input.hasClass('placeholder')) {
             if ($input.data('placeholder-password')) {
                 $input = $input.hide().next().show().attr('id', $input.removeAttr('id').data('placeholder-id'));
                // If `clearPlaceholder` was called from `$.valHooks.input.set`
                 if (event === true) {
                     return $input[0].value = value;
                }
                 $input.focus();
             } else {
                input.value = '';
                 $input.removeClass('placeholder');
                input == safeActiveElement() && input.select();
            }
         }
    }
 
    function setPlaceholder() {
         var $replacement;
        var input = this;
         var $input = $(input);
        var id = this.id;
         if (input.value == '') {
            if (input.type == 'password') {
                if (!$input.data('placeholder-textinput')) {
                    try {
                        $replacement = $input.clone().attr({ 'type': 'text' });
                    } catch(e) {
                        $replacement = $('<input>').attr($.extend(args(this), { 'type': 'text' }));
                    }
                   $replacement
                         .removeAttr('name')
                        .data({
                            'placeholder-password': $input,
                           'placeholder-id': id
                         })
                        .bind('focus.placeholder', clearPlaceholder);
                    $input
                         .data({
                            'placeholder-textinput': $replacement,
                             'placeholder-id': id
                        })
                        .before($replacement);
                }
                 $input = $input.removeAttr('id').hide().prev().attr('id', id).show();
                 // Note: `$input[0] != input` now!
             }
             $input.addClass('placeholder');
             $input[0].value = $input.attr('placeholder');
         } else {
             $input.removeClass('placeholder');
         }
     }
 
     function safeActiveElement() {
        // Avoid IE9 `document.activeElement` of death
         // https://github.com/mathiasbynens/jquery-placeholder/pull/99
         try {
            return document.activeElement;
        } catch (exception) {}
    }

 }(this, document, jQuery));

$(function(){
	//IE8  placeholder 属性
	if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/8./i)=="8.") 
	{
	   $(".Jinsearch").placeholder();
	   $(".search_input").placeholder();
	   

	}
	//IE8  placeholder 属性
	if(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.match(/9./i)=="9.") 
	{
	   $(".Jinsearch").placeholder();
	   $(".search_input").placeholder();
	   

	}
})